Fix a leak in LatencyHeader_QueueTimeout
Fix a leak in LatencyHeader_QueueTimeout

Reviewed By: yfeldblum

Differential Revision: D17298782

fbshipit-source-id: 1e5d4ae93c9467259c499175721556793397de9d

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift